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• Reading a stream from gstreamer using ffmpeg

  23 septembre 2021, par Никель Виктор

  The title reveals the essence of the problem, but it is more specific

  


  I use Brave to generate a stream and OvenMediaEngine (hereinafter referred to as OME) as a media server

  


  The problem is that Brave is built on gstreamer and OME is built on ffmpeg

  


  Gstreamer uses nanoseconds to measure time, ffmpeg uses milliseconds. Because of this, when I stream from Brave to OME, I get the following logs

  


  ovenmediaengine_1  | [2021-09-22 11:45:34.832] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:1 last.pts: 1005022355050, cur.pts: 1009317322368, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:34.854] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:1 last.pts: 1009317322368, cur.pts: 1013612289685, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:34.856] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:0 last.pts: 1009317322359, cur.pts: 1013612289688, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:34.897] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:1 last.pts: 1013612289706, cur.pts: 1017907257024, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:34.897] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:0 last.pts: 1013612289688, cur.pts: 1017907257051, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:34.921] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:0 last.pts: 1017907257051, cur.pts: 1022202224313, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:34.939] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:1 last.pts: 1017907257045, cur.pts: 1022202224362, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:34.961] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:1 last.pts: 1022202224362, cur.pts: 1026497191680, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:34.963] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:0 last.pts: 1022202224313, cur.pts: 1026497191676, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:34.984] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:0 last.pts: 1026497191676, cur.pts: 1030792159005, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:35.003] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:1 last.pts: 1026497191701, cur.pts: 1030792159018, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:35.025] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:1 last.pts: 1030792159018, cur.pts: 1035087126336, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:35.026] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:0 last.pts: 1030792159005, cur.pts: 1035087126335, tb(1/1000), diff: 4294967ms
ovenmediaengine_1  | [2021-09-22 11:45:35.046] W [InboundWorker:17] MediaRouter | mediarouter_stream.cpp:1044 | Detected abnormal increased timestamp. track:0 last.pts: 1035087126335, cur.pts: 1039382093697, tb(1/1000), diff: 4294967ms


  


  and the behavior of the stream type :

  


  

  1. I open the stream in VLC

  


  2. I see one second of the video

  


  3. The video freezes and I can't open it further

  


  


  Has anyone encountered a similar problem ? There is a solution, or at least the direction of the solution.

  


  It is also worth saying that I used to use rtsp-simple-server and it worked fine

  


• Revert "Replace FLAC__CPU_X86_64 with FLaC__CPU_X86_64."

  15 juin 2014, par Erik de Castro Lopo

  Revert "Replace FLAC__CPU_X86_64 with FLaC__CPU_X86_64."
  This reverts commit 151739921b74fbf31420358a5fbeb094efa017ed.
  This patch only when part way to replace all FLAC_* with FLaC_*
  
  and its really not worth going all the way.
  

  • [DH] configure.ac
  • [DH] src/libFLAC/cpu.c
  • [DH] src/libFLAC/fixed_intrin_sse2.c
  • [DH] src/libFLAC/fixed_intrin_ssse3.c
  • [DH] src/libFLAC/include/private/cpu.h
  • [DH] src/libFLAC/include/private/fixed.h
  • [DH] src/libFLAC/include/private/lpc.h
  • [DH] src/libFLAC/include/private/stream_encoder.h
  • [DH] src/libFLAC/lpc_intrin_sse.c
  • [DH] src/libFLAC/lpc_intrin_sse2.c
  • [DH] src/libFLAC/lpc_intrin_sse41.c
  • [DH] src/libFLAC/stream_encoder.c
  • [DH] src/libFLAC/stream_encoder_intrin_sse2.c
  • [DH] src/libFLAC/stream_encoder_intrin_ssse3.c

• ffmpeg removing silence makes mp3 longer ?

  13 août 2017, par pocketg99

  I’ve been using the following command to attempt to remove silent segments from an mp3 file

  ffmpeg -i "podcasts/audio1.mp3" -af silenceremove=1:0:-50dB "/tmp/pod-sil.mp3"

  For some reason the resulting mp3 is twice as log as the input mp3. It is not half as fast. There does not appear to be any duplicated audio. There is some silence, but not an hour’s worth. For a given portion of the input file, you can find the same thing in the output file by going to twice the timestamp of the input file.

  The files are long so I have not yet listened to them all the way through. I really have no idea where the extra length is coming from, the files seem normal.

  Here is the full output from ffmpeg

  ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [mp3 @ 0x21880e0] Skipping 0 bytes of junk at 0. 
  
  [mp3 @ 0x21880e0] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from 'podcasts/audio1.mp3':
  
    Duration: 01:00:00.20, start: 0.000000, bitrate: 320 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
  
  File '/tmp/pod-sil.mp3' already exists. Overwrite ? [y/N] y
  
  Output #0, mp3, to '/tmp/pod-sil.mp3':
  
    Metadata:
  
      TSSE            : Lavf56.40.101
  
      Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp
  
      Metadata:
  
        encoder         : Lavc56.60.100 libmp3lame
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mp3 (native) -> mp3 (libmp3lame))
  
  Press [q] to stop, [?] for help
  
  [libmp3lame @ 0x21999e0] Trying to remove 1152 samples, but the queue is empty
  
  size=   56253kB time=01:00:00.16 bitrate= 128.0kbits/s    
  
  video:0kB audio:56253kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000439%